diff --git a/doc/languages-frameworks/haskell.md b/doc/languages-frameworks/haskell.md
index 3da13dd9ed6..18b2fd65f44 100644
--- a/doc/languages-frameworks/haskell.md
+++ b/doc/languages-frameworks/haskell.md
@@ -740,7 +740,7 @@ to the `stack.yaml` like the following:
       enable: true
 	  packages: [ zlib ]
 
-Stack's Nix support knows to add `${zlib}/lib` and `${zlib}/include` as an
+Stack's Nix support knows to add `${zlib.out}/lib` and `${zlib.dev}/include` as an
 `--extra-lib-dirs` and `extra-include-dirs`, respectively. Alternatively, you
 can achieve the same effect by hand. First of all, run